Experimental assessment of performance and emissions for hydrogen-diesel dual fuel operation in a low displacement compression ignition engine

Estrada, L.; Moreno, E.; Gonzalez‐Quiroga, Arturo; Bula, Antonio; Forero, Jorge Duarte

doi:10.1016/j.heliyon.2022.e09285

Cited by 19 publications

(12 citation statements)

References 51 publications

(60 reference statements)

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“…5 , which subsequently leads to lower amounts found in the exhaust gases, aspect which also influence the CO 2 emission level. Similar results which shows the decrease of the CO 2 emission level at the increase of hydrogen cyclic dose were registered also by other researchers [5] , [8] , [9] , [10] , [11] , [12] , [18] , [19] , [20] , [21] .…”

Section: Results Of the Experimental Investigation And Discussionsupporting

confidence: 89%

“…Different researchers use hydrogen as alternative fuel to fuel different diesel engines and their research results show the influence of hydrogen on combustion process and engine performance. As example, Estrada et al [ 8 ] shows that hydrogen use assure the reduction of the brake specific fuel consumption, increase of the thermal efficiency, decrease of pollutant emissions level for CO, HC, decrease of the greenhouse gas CO 2 , but increase of the NO x emission level [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aspects of an experimental study of hydrogen use at automotive diesel engine

Cernat

Pană

Negurescu

et al. 2023

Heliyon

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Section: Results Of the Experimental Investigation And Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Aspects of an experimental study of hydrogen use at automotive diesel engine

Cernat

Pană

Negurescu

et al. 2023

Heliyon

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“…The heat release rate by the combustion process with respect to the crank angle was determined from Eq. (13) [ 43 ].

where

is the specific heat ratio of in-cylinder gas and

is the heat loss from the engine cylinder.…”

Section: Combustion Modelmentioning

confidence: 99%

“…To calculate the heat loss, Eq. (14) was used [ 43 ].

where

is the temperature of the cylinder wall,

is the instanteneous surface area of the combustion chamber and

is the heat transfer coefficient.…”

Section: Combustion Modelmentioning

confidence: 99%

Analysis of performance, emissions, and lubrication in a spark-ignition engine fueled with hydrogen gas mixtures

García¹,

Abril²,

León³

2022

Heliyon

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“…Radial turbines are widely used in the transport industry. They are part of the supercharging system of engines used for various actions in different branches of the transport industry such as air, land, and water transport [1,2] in fossil fuel engines [3] as well as in hydrogen hybrid engines [4][5][6], hybrid electrical turbines [7], fuel cells [8], biofuel propulsion [9,10], and Organic Rankine Cycle [11][12][13]. Therefore, the improvement of the radial turbine in these systems still plays an important role in the current propulsion technologies.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Effects of Different Rotor Tip Gaps in a Radial Turbine Operating at High Pressure Ratios Reaching Choked Flow

et al. 2022

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To operate, radial turbines used in turbochargers require a minimum tip gap between the rotor blades and the stationary wall casing (shroud). This gap generates leakage flow driven by the pressure difference between the pressure and suction side. The tip leakage flow is largely unturned, which translates into a reduction of the shaft work due to the decrease in the total pressure. This paper investigates the flow through the rotor blade tip gap and the effects on the main flow when the turbine operates at a lower and higher pressure ratio with the presence of supersonic regions at the rotor trailing edge for two rotational speeds using computational fluid dynamics (CFD). The rotor tip gap has been decreased and increased up to 50% of the original tip gap geometry given by the manufacturer. Depending on the operational point, the results reveal that a reduction of 50% of the tip gap can lead to an increase of almost 3% in the efficiency, whereas a rise in 50% in the gap penalty the efficiency up to 3%. Furthermore, a supersonic region appears in the tip gap just when the flow enters through the pressure side, then the flow accelerates, leaving the suction side with a higher relative Mach number, generating a vortex by mixing with the mainstream. The effects of the vortex with the variation of the tip gap on the choked area at the rotor trailing edge presents a more significant change at higher than lower speeds. At a higher speed, the choked region closer to the shroud is due to the high relative inlet flow angle and the effects of the high relative motion of the shroud wall. Furthermore, this relative motion forces the tip leakage vortex to stay closer to the tip suction side, generating a subsonic region, which increases with the tip gap height. The leakage flow at lower and higher rotational speed does not affect the main flow close to the hub. However, close to the shroud, the velocity profile changes, and the generated entropy increases when the flow goes through the tip gap.

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Experimental assessment of performance and emissions for hydrogen-diesel dual fuel operation in a low displacement compression ignition engine

Cited by 19 publications

References 51 publications

Aspects of an experimental study of hydrogen use at automotive diesel engine

Aspects of an experimental study of hydrogen use at automotive diesel engine

Analysis of performance, emissions, and lubrication in a spark-ignition engine fueled with hydrogen gas mixtures

Numerical Analysis of the Effects of Different Rotor Tip Gaps in a Radial Turbine Operating at High Pressure Ratios Reaching Choked Flow

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